If the following scores are sample data, the Sample Variance equals

A researcher classifies students by their eye color (e.g., brown, green, blue, hazel, grey, etc.). What scale of measurement is being used to classify the students?

For the following frequency table: X f 5 5 4 5 3 2 2 3 1 5 What is the relative frequency (proportion) of the score X = 1? 

I’m interested in whether the time of day of watching lectures influences learning. To answer this question, I randomly selected 90 participants. Then I randomly assigned these participants into 3 conditions: In the Morning Condition, participants watched video lectures only in the morning. In the Afternoon Condition, participants watched video lectures only in the afternoon. In the Evening Condition, participants watched video lectures only in the Evening. Afterwards, I measured each conditions’ learning on a test of the lecture material. In this example, one of the conditions is  ______________.

What is the z score for X =100, μ = 90, σ = 5?

The following system is described by  T e   =   J d ω d t   +   B ω   +   T l J   =   0 . 01   k g m 2 ,   B   =   0 . 01   N m / r a d s – 1 ,   T l   =   48   N m Screenshot 2023-10-11 134350.png What is the value of electrical torque  T e at 1ms?

Click the link “Open Exam #2” to go to Connect and begin your exam. Open Exam #2 Complete the exam and remember to return to Canvas and submit here when you are done.

The top crossbar for a gantry crane is to be constructed out of 6 × 2.034 channel (see table below for geometric properties) and with a length L = 7 feet. The channel is implemented as shown in the close-up so that it can be considered as a simply-supported beam that bends about the 1-1 axis. It is desired that the crane be used to repeatedly lift a weight at the midpoint of the crossbar. Consider the weight as a point force acting through the centroid of the channel that varies between 0 lbf and 8,000 lbf. The channel material is hot-rolled AISI 1045 (Sut = 82 ksi, Sy = 45 ksi), and you don’t need to consider any stress concentrations or the weight of the channel crossbar. Determine the following: The maximum bending stress (σmax) in the crossbar (the shear stress can be ignored in the analysis) The modified endurance limit (Se) for this application with 90% reliability The factor of safety with respect to infinite life (nf) using the Modified Goodman criteria The number of cycles (N) it is expected to last before fatigue failure Write down all your work to scan and submit, including a free-body diagram and bending moment diagram for the crossbar. σmax = ksi (round answer to 1 decimal place)Se =  ksi (round answer to 1 decimal place)nf =  (round answer to 2 decimal places)N = (round answer to nearest thousand; enter “infinite” if infinite life is predicted)      

V. Kultur: Märchen/ Nibelungenlied.  Was haben Sie gelernt?  Sind die Informationen richtig oder falsch? (5 Punkte)  

Only 1 point will be awarded for the numerical answer ALL other points will be assigned from your uploaded “Scratch Paper” turned in immediately after you finish the exam in Canvas. Be sure to show ALL WORK and report your answer with correct significant figures and units.   PART A: Use the ∆H0f data in the table to calculate ∆Hrxn (kJ/mol) for: 2 H2S (g) + 3 O2 (g)